Hearing Aid Compatible Wall Mount Kit Included 2.5mm Direct Connect Headset Jack Compatible with KX-TA824, KX-TAW848, KX-TA624, KX-TA1232, KX-TD308, KX-TD816, KX-TD1232, KX-TD500 Phone Systems, KX-TDA50G, KX-TDA100, KX-TDA200, KX-TDE100, KX-TDE200, KX-TDE600, KX-TDA600, KX-NCP500, KX-NCP1000 Phone Systems with Hybrid Extension Card, May require upgraded or additional power supply